Magnetic field induced global paramagnetic response in Fulde-Ferrell superconducting strip

Autor:	Marychev, P. M., Plastovets, V. D., Vodolazov, D. Yu.
Rok vydání:	2020
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Mesoscale and Nanoscale Physics
Druh dokumentu:	Working Paper
Popis:	We theoretically study magnetic response of a superconductor/ferromagnet/normal-metal (SFN) strip in an in-plane Fulde--Ferrell (FF) state. We show that unlike to ordinary superconducting strip the FF strip can be switched from diamagnetic to paramagnetic and then back to diamagnetic state by {\it increasing} the perpendicular magnetic field. Being in paramagnetic state FF strip exhibits magnetic field driven second order phase transition from FF state to the ordinary state without spatial modulation along the strip. We argue that the global paramagnetic response is connected with peculiar dependence of sheet superconducting current density on supervelocity in FF state and it exists in nonlinear regime. Comment: 8 pages, 8 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2007.11351 Zobrazit plný text záznamu View this record from Arxiv